Dental impression tray



FIG. 1 is a top perspective view of a dental impression tray showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation thereof of the left;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevation thereof; and

FIG. 7 is a cross-section taken along lines 7--7 of FIG. 2. 

The ornamental design for a dental impression tray, substantially as shown and described. 